It is c because radiation is a type of another word for heat
All of them were split because each of those countries were being controlled by the big four which were the former allies. Hope that helps
Answer:
feudal system. ... In a feudal system, a peasant or worker known as a vassal received a piece of land in return for serving a lord or king, especially during times of war.
Explanation:
Vassals were expected to perform various duties in exchange for their own fiefs, or areas of land.
The circular flow of economic activity is a model showing the basic economic relationships within a market economy. ... In the circular flow of the economy, money is used to purchase goods and services. Goods and services flow through the economy in one direction while money flows in the opposite direction.
